Anyone know the rocker arm ratio for the F20/F22 engine? To be more specific (if it matters) a 2005 s2000. So I’ve looked around and didn’t find any direct results online. Checked against a K series (K20) which is 1.75:1 I think, but the Honda part numbers do not coincide. I am interested because I do not want to overload my rockers with my massive cams and create a catastrophic engine failure. I’ll just say my camshafts are somewhere in the Skunk2 S2 and S3 cams range ( they’re custom made). I would like to re-verify more info on these cams before I give out more specs and numbers as far as duration and lift.

Secondly and probably more importantly, who would know how to calculate a value that would tell me if I am safe or not. I could just call it a day and order Ferrea rocker arm set but, I don’t want to lose low end torque and if I can save 1k that would be nice yeah? That 1k can go towards a turbo for my MkIV Supra.

I have clearanced the rockers already because they have left their mark....Wish I would’ve known at the time of initial install but they’re good now. Only the exhaust cam was needing to be clearanced though. I have .5175” lift on exhaust and .540” on the intake. My intake cam is giving me a headache because it has 10 degrees more duration than advertised. I am in it with very low V2V clearance. That’s my current battle. I am glad to know that the stock rockers are good enough. Wish I can go Ferrea but I can’t afford to lose the low end. If Ferrea made vtec functioning rockers like they do the non vtec rockers I’d get them for sure.